Spraying apparatus.



W. CRESSY.

SPRAYING APPAIUX'IUS.

APPLIQATION FILED 001213, 1913.

Patented July 21, 1914.

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sensitive anre m rus Specification of Letters Patent. Patented'July 21, 1 914, v4pp11cationifiled October 13,'1:9 1 3. Serial No. 794,937.

To all whom it may concern Be 'it. known that I, WALTER CRE SSY, of

Gloucester, in the, county of Essex and State of Massachusetts, have lnvented certain new and useful Improvements in Spraying Aphotit-is 0t such viscosity that it will not apparatus, and F g 2 s a v w flow by gravity'through s ray pipesor nozzles,:hence in order to pr dperly a .plygiyttfio e the crushed rock forming the ha y road bed, it must bereduced to afiuid condition and maintained under pressure,

The object therefore of my invention is to rovide an a paratus adapted to recelve Enid asphalt rom a central stati n, ccnvey it, within a reasonable time, to the place here it is'to be ap lied; maintalnlng 1t 1n uid condition whi e in trans t; and fore: ng it out under pressure through spraying no z es a furt er i t is to pro ide means whereby he tank ay b r a ily and qu t y fill d- 1 wlth'these and other 0h10ts 1n V ew my ieY- ntien ec sist 11.1., an aatcmohile u k carrying a tank provided with a d scharge pin a st amg n et rjsi e y g t am o i fil hh ihg- Pi e i hm t ank and to st m p pes le d hg' h e. di ha g 11 19 and a a t PWQP a tua e y te m o exhausting the air from the tank when filhng the latter and for. supplying compressed all to th latt r wh lesp y ga My inv nti n fur he c us ts 1n th etails of construction and combination of parts as will be more fully explamed and pointed out inthe claims.

in the a mpa v e r wmes figure 1 is a v w in sid e icn of my improved 1n rear end el vat e l 1 represents an automob le trucl preferably of the. gasolene type, and 1s a tank of suitable capacity,.pruvided at its top with a manhole covered by a cap 3, the latter bein Pr id d w h a t read qp mng ter the attachment of the fill ng pipe leading from a still, the said threaded opening heing normally closed a screw plug 4." The having two branches 6 and 7, each" of which ta ks is provided with a discharge pipe, 5,

le d t a ray p pe 8- Th pr y p p s a i preferably parallel and at rlght angles tohe en th t the uck, d a h is itled with a series at nozzles throughw ch the as halt is pro ected downwardly into an as w t the ea be 'y meansof th w pray p pjes th max mum qu ntity may be ischarged over a given ar a w h the ma hine e ng a a e e e peed nd sser quantifi s may be di c arg d y proper manipulation of the valves 8!, in the bran h pipes 6 and 7 Th dis harg pipe .5 isr l a prov de w a. qu k a tm. alve 9,

whi h on rols the discharge of asp altfrom i M0 rated on the truck 1 n rear of tank 2 s the steam g nerat r 10, W may h f oi r coal urni type, preferably latte and. i placed transve y of u $59 that ts front will, be at the side adjacent the operators platform 11, which latter is suspended re the side of the tru f am at t e rear at. one of the drive Wheels of the truck, so, that theoperatoron the platform, will, in addition to regulating dls ha ee hem the spray Pipe be n a P ilt en a so to take c r oft s s e gen or and pum of the tan is the feed, water reservoir 12,

the

n d Q th tru k ra -at one side connected pipe 13 with the pump 14, the

latter beihg' connected to the boiler or steam l va or 10, by h feed P p L d r a e do f he s ea ator, i the steam pipe 16, and connected to the latter, is

a b anch, Pipe 17 hie c m unicates with the heating coil 18., located within the tank '2 near th 'bottom of the latter, which coil is of sufiglcient size and capacity to maintain h a p a Wi n he ank t a t mpe a re of b een. 3. and 0 deg e Th heating coil 18 passes out from the rear end of" tank 2 an terminates within the feed water reservoir 12 and operates to heat the boiler feed water n the latter, and any excess pressure that may accumulate in the feed water reservoir 12, will be free to QS cape through the blow out nozzle19. The

the pump, and a pipe 21 connects the steam on the operators platform 11, for actuating leads from the pipe "16 and asshown, connects with the air pipe 24 leading into said tank.- All ofsaid pipes are provided with valves for cutting oif or controlling the pas-- sage of steam, air and water.

I so

27 are steam pipes leading from the generator or from the main steam supply pipe 16, and discharging into the discharge pipe 5 on opposite sides of the valve 9, so'that by admitting steam to the pipe in advance of the valve it will heat up and clean out the pipe between the valve and the tank, and by admitting steam at the rear of the valve'the spray pipes will be cleaned. The asphalt when cold is a solid, hence in order to apply it by sprayers it must be reduced to a fluid condition by heat, and even then its viscosity is such that it will not flow by gravity but must be pushed or pulled from the tank, hence when the valvesin the spray pipes or discharge pipe are closed to shut off the flow,

the asphalt within said pipes remains unless" blown out by the steam, hence by connecting a steam pipe to the discharge pipe in rear of the valve 9 the pipes may be cleaned.

after the operationand be thoroughly cleaned and heated before the commencethe air pump 22, the partial vacuum created" ment of the operation. The discharge pipe $5 ofcourse would be closed while asphalt and into the tank by suction.

other like heavy material is being drawn To fill the tank the latter is connected to an asphalt still by a pipe cou led to the .threaded opening in the man ole cover, and the air exhausted from the tank 2gby ln the tank, operating to pull the asphalt ich is semi-fluid and heated'to a temper at re of about 300 F. into the tank from the still. After the tank has been filled to near the top it is disconnected from the still and the opening closed by the screw plug 4. The contents of the tank is kept highly heated by the steam coils within the latter,

and the apparatus is then ready for use.

After the tank has been filled, I prefer to force air into it, as the compressed air prevents the asphalt from foaming, and while spraying, compressed air is continuously supplied to the tank for forcing the liquid asphalt out through the discharge pipe. Before the discharge valve is opened,.the

discharge pipe and spray pipes nd nozzles should be thoroughly cleansed'and heated by steam admitted through pipe 27 at the rear of valve 9, and this should also be done after discharge has been :opped so as to prevent the accumulation of asphalt in the spray pipe and nozzles. The air pump may be kept going continuously after the tank has been filled, or the valve 23 in the steam pipe for the latter may be so located that the operator on the platform 11 may be in a position toactuate same, and if so the pump may be stopped while the apparatus is en route from the still to thework after the desired or necessarypressure has'been acquired in the tank, and started up again truck, it ispossible to convey the asphalt from a central station to remote points in a comparatively short time, thus doing away with the necessity of having a temporary 1 heating plant near the place where the work is being done.

. While en route from the still to the work,

the pipes can be cleaned and heated by the operator on platform 11 and compressed air forced into the tank above the asphalt, so that by the time the apparatus reaches the work, it'is ready to start in, and as soon as it has discharged its contents, it can return immediately to the plant and be refilled. Heretofore these spray tanks have generally been hauled by traction engines, and their contents heated by; steam from the tractor, hence heat was available only when the tank was connected with a steam generator. As tractors were slow and could not be used economically for hauling the tanks any distance, it was necessary to.lo'-. cate a temporary heating plant near the work, or provide a series of tanks, to be used successively with means for maintaining the heat in the tanks while idle. Such an equipment was expensive and slow to operate, all of which objections are overcome by the use of my improved apparatus.

By the term asphalt, I mean a bituminous substance of such general character as.

inc ines stood that I do not Wish to confine myself to the exact construction and arrangement of parts shown and described but Having fully described my invention What I claim as new and desire tosecure by Lettern-Patent, is

1. An apparatus for spraying asphalt consisting of a self propelled truck, a. steam generator and a tank on said truck, the said tank having a discharge pipe with a valve therein, an air pump having a pipe leading into the tank for forcing alr into the same or for exhausting it from the tank, a steam pipe from the generator leading into the.

tank for heating the contents of the latter, a steam ipe leadin to the pump, a steam pipe lea mg to the ischarge pipe, valves in said steam pipes and an operators platform, the valve in the steam and discharge pipes being within reach ofthe operator whereby they may be actuated while the truck is moving.

2. An apparatus for spraying asphalt consisting of a self propelled truck, a tank thereon having a filling opening and a discharge pipe, a valve in said discharge pipe, an air pump connected with the tank for exhausting the air therefrom whereby when thefilling pipe from the asphalt heater or still is connected with the tank, the asphalt will be drawn into the tank by the partial vacuum in the latter, and also for creating a pressure within the tank for forcing the asphalt therefrom, heating pipes within the tank, a steam dgenerator carried by the truck, and pipes lea mg from the steam generator to the air pump, heating pipes within the exhausting the air therefrom while filling the tank and also for creating a pressure within the tank for forcing the asphalt therefrom, a heating pipe within the tank, a steam generator carried by the truck, steam pipes leading from the generator to the pump, a heating pipe within the tank, and a discharge pipe, valves in the pipes leading to the pump and discharge pipe and an operators platform located with relation to said valves and also the valve in the discharge pipe whereby they may be actuated by the operator when the truck is in motion.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses WALTER ORESSY.

Witnesses:

WILLIAM E. KERR, Bonner F. HARMBTON.

Jopies at this patent maybe obtained for five cents each, by addressing the Gommissioner of 2mm. Washington, B. 6." 

